Albedo Estimates - Approach 2

("LiDAR Hull" Approach)

Summary: This document contains a summary of albedo estimates produced through 'Approach 2', including the figures listed below:

  • Section 1. Plots relevant to final albedo estimates.
  • Section 2. Mixed effects model + output.
  • Section 3. Relevant data + albedo estimates for each site.

Section 1

This figure shows several plots related to the final albedo estimates produced by Approach 2.

Section 2

This figure shows an initial attempt at a mixed effects model analysis.

Correlation matrix of explanatory variables: It looks like 'Moose Density' and 'Roe Deer Density' are moderately correlated (~0.51).

Model in R: Random effect is month nested under site ("LocalityName")

model <- lmer(Composite_Albedo ~ Treatment +
                      Productivity_Index +
                      Canopy_Height_MAD +
                      Clearcut_Lidar +
                      Moose_Density +
                      Red_Deer_Density +
                      Roe_Deer_Density +
                      (1 | LocalityName/Month),
              data = model_data)

Model Output:

  Composite_Albedo
Predictors Estimates CI p
(Intercept) 0.22319 0.16504 – 0.28133 <0.001
Treatment [open] 0.02093 0.01816 – 0.02371 <0.001
Productivity_Index -0.08045 -0.15163 – -0.00927 0.027
Clearcut_Lidar -0.00781 -0.01200 – -0.00362 <0.001
Moose_Density 0.00087 0.00029 – 0.00145 0.003
Red_Deer_Density 0.00027 -0.00130 – 0.00184 0.737
Roe_Deer_Density -0.00167 -0.00306 – -0.00029 0.018
Random Effects
σ2 0.00
Ï„00 Month:LocalityName 0.01
Ï„00 LocalityName 0.00
ICC 0.95
N Month 12
N LocalityName 37
Observations 888
Marginal R2 / Conditional R2 0.120 / 0.953

Exploring Model Fit:

Section 3

This section shows relevant data and albedo estimates for each SustHerb site.

## Site:  bratsberg

## Site:  didrik_holmsen

## Site:  drangedal1

## Site:  drangedal3

## Site:  drangedal4

## Site:  eidskog

## Site:  fet_3

## Site:  fritsoe1

## Site:  fritsoe2

## Site:  furesdal

## Site:  halvard_pramhus

## Site:  hi_tydal

## Site:  kviteseid1

## Site:  kviteseid2

## Site:  kviteseid3

## Site:  malvik

## Site:  namdalseid_1kub

## Site:  nome_cappelen1

## Site:  nome_cappelen2

## Site:  notodden3

## Site:  notodden5

## Site:  notodden6

## Site:  nsb_verdal

## Site:  selbu_flub

## Site:  selbu_kl

## Site:  selbu_sl

## Site:  singsaas

## Site:  sl_tydal

## Site:  stangeskovene_aurskog

## Site:  stangeskovene_eidskog

## Site:  steinkjer_1bbb

## Site:  steinkjer_2bbb

## Site:  stig_dahlen

## Site:  sub_namdalseid

## Site:  truls_holm

## Site:  verdal_1vb

## Site:  verdal_2vb